Added GpsGate protocol (fix #138)

3 files changed, 203 insertions, 4 deletions

diff --git a/src/org/traccar/ServerManager.java b/src/org/traccar/ServerManager.java
index 85aa8b2cc..7f73dd019 100644
--- a/src/org/traccar/ServerManager.java
+++ b/src/org/traccar/ServerManager.java
@@ -131,8 +131,10 @@ public class ServerManager {
         initGt06Server("gt06");
         initMegastekServer("megastek");
         initNavigilServer("navigil");
-        initMta6Server("mta6");
+        initGpsGateServer("gpsgate");
         initTeltonikaServer("teltonika");
+        initMta6Server("mta6");
+        initMta6CanServer("mta6can");
 
         // Initialize web server
         if (Boolean.valueOf(properties.getProperty("http.enable"))) {
@@ -610,6 +612,34 @@ public class ServerManager {
         }
     }
 
+    private void initGpsGateServer(String protocol) throws SQLException {
+        if (isProtocolEnabled(properties, protocol)) {
+            serverList.add(new TrackerServer(this, new ServerBootstrap(), protocol) {
+                @Override
+                protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                    byte delimiter[] = { (byte) '\r', (byte) '\n' };
+                    pipeline.addLast("frameDecoder",
+                            new DelimiterBasedFrameDecoder(1024, ChannelBuffers.wrappedBuffer(delimiter)));
+                    pipeline.addLast("stringDecoder", new StringDecoder());
+                    pipeline.addLast("stringEncoder", new StringEncoder());
+                    pipeline.addLast("objectDecoder", new GpsGateProtocolDecoder(ServerManager.this));
+                }
+            });
+        }
+    }
+
+    private void initTeltonikaServer(String protocol) throws SQLException {
+        if (isProtocolEnabled(properties, protocol)) {
+            serverList.add(new TrackerServer(this, new ServerBootstrap(), protocol) {
+                @Override
+                protected void addSpecificHandlers(ChannelPipeline pipeline) {
+                    pipeline.addLast("frameDecoder", new TeltonikaFrameDecoder());
+                    pipeline.addLast("objectDecoder", new TeltonikaProtocolDecoder(ServerManager.this));
+                }
+            });
+        }
+    }
+    
     private void initMta6Server(String protocol) throws SQLException {
         if (isProtocolEnabled(properties, protocol)) {
             serverList.add(new TrackerServer(this, new ServerBootstrap(), protocol) {
@@ -623,13 +653,14 @@ public class ServerManager {
         }
     }
 
-    private void initTeltonikaServer(String protocol) throws SQLException {
+    private void initMta6CanServer(String protocol) throws SQLException {
         if (isProtocolEnabled(properties, protocol)) {
             serverList.add(new TrackerServer(this, new ServerBootstrap(), protocol) {
                 @Override
                 protected void addSpecificHandlers(ChannelPipeline pipeline) {
-                    pipeline.addLast("frameDecoder", new TeltonikaFrameDecoder());
-                    pipeline.addLast("objectDecoder", new TeltonikaProtocolDecoder(ServerManager.this));
+                    pipeline.addLast("httpDecoder", new HttpRequestDecoder());
+                    pipeline.addLast("httpEncoder", new HttpResponseEncoder());
+                    pipeline.addLast("objectDecoder", new Mta6ProtocolDecoder(ServerManager.this));
                 }
             });
         }
diff --git a/src/org/traccar/helper/Crc.java b/src/org/traccar/helper/Crc.java
index cef0cc482..a7adca874 100644
--- a/src/org/traccar/helper/Crc.java
+++ b/src/org/traccar/helper/Crc.java
@@ -16,6 +16,7 @@
 package org.traccar.helper;
 
 import java.nio.ByteBuffer;
+import java.nio.charset.Charset;
 
 /**
  * CRC functions
@@ -126,5 +127,14 @@ public class Crc {
     public static int crc16CcittSeed(ByteBuffer buf, int seed) {
         return crc16Reflected(buf, seed, crc16CcittTableReverse) ^ crc16CcittXorout;
     }
+    
+    public static String nmeaChecksum(String msg) {
+        int checksum = 0;
+        byte bytes[] = msg.getBytes(Charset.defaultCharset());
+        for (int i = 1; i < msg.length(); i++) {
+            checksum ^= bytes[i];
+        }
+        return String.format("*%02x", checksum).toUpperCase();
+    }
 
 }
diff --git a/src/org/traccar/protocol/GpsGateProtocolDecoder.java b/src/org/traccar/protocol/GpsGateProtocolDecoder.java
new file mode 100644
index 000000000..5f51feab9
--- /dev/null
+++ b/src/org/traccar/protocol/GpsGateProtocolDecoder.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2013 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.protocol;
+
+import java.util.Calendar;
+import java.util.TimeZone;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.traccar.BaseProtocolDecoder;
+import org.traccar.ServerManager;
+import org.traccar.helper.Crc;
+import org.traccar.helper.Log;
+import org.traccar.model.Position;
+
+public class GpsGateProtocolDecoder extends BaseProtocolDecoder {
+
+    private Long deviceId;
+
+    public GpsGateProtocolDecoder(ServerManager serverManager) {
+        super(serverManager);
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "\\$GPRMC," +
+            "(\\d{2})(\\d{2})(\\d{2})\\.(\\d+)," + // Time (HHMMSS.SSS)
+            "([AV])," +                    // Validity
+            "(\\d{2})(\\d{2}\\.\\d+)," +   // Latitude (DDMM.MMMM)
+            "([NS])," +
+            "(\\d{3})(\\d{2}\\.\\d+)," +   // Longitude (DDDMM.MMMM)
+            "([EW])," +
+            "(\\d+\\.\\d+)?," +            // Speed
+            "(\\d+\\.\\d+)?," +            // Course
+            "(\\d{2})(\\d{2})(\\d{2})" +   // Date (DDMMYY)
+            ".+");                         // Other (Checksumm)
+
+    private void send(Channel channel, String message) {
+        if (channel != null) {
+            channel.write(message + Crc.nmeaChecksum(message) + "\r\n");
+        }
+    }
+    
+    @Override
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        String sentence = (String) msg;
+        
+        // Process login
+        if (sentence.startsWith("$FRLIN")) {
+            if (sentence.startsWith("$FRLIN,IMEI")) {
+                String imei = sentence.substring(12, sentence.length() - 4);
+                try {
+                    deviceId = getDataManager().getDeviceByImei(imei).getId();
+                    send(channel, "$FRSES," + channel.getId());
+                } catch(Exception error) {
+                    Log.warning("Unknown device - " + imei);
+                    send(channel, "$FRERR,AuthError,Unknown device");
+                }
+            } else {
+                Log.warning("Unsupported login type");
+                send(channel, "$FRERR,AuthError,Unsupported login type");
+            }
+        }
+
+        // Process data
+        else if (sentence.contains("$GPRMC") && deviceId != null) {
+
+            // Send response
+            if (channel != null) {
+                channel.write("OK1\r\n");
+            }
+
+            // Parse message
+            Matcher parser = pattern.matcher(sentence);
+            if (!parser.matches()) {
+                return null;
+            }
+
+            // Create new position
+            Position position = new Position();
+            position.setDeviceId(deviceId);
+
+            Integer index = 1;
+
+            // Time
+            Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+            time.clear();
+            time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++)));
+            time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
+            time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
+            index += 1; // Skip milliseconds
+
+            // Validity
+            position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false);
+
+            // Latitude
+            Double latitude = Double.valueOf(parser.group(index++));
+            latitude += Double.valueOf(parser.group(index++)) / 60;
+            if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
+            position.setLatitude(latitude);
+
+            // Longitude
+            Double lonlitude = Double.valueOf(parser.group(index++));
+            lonlitude += Double.valueOf(parser.group(index++)) / 60;
+            if (parser.group(index++).compareTo("W") == 0) lonlitude = -lonlitude;
+            position.setLongitude(lonlitude);
+
+            // Speed
+            String speed = parser.group(index++);
+            if (speed != null) {
+                position.setSpeed(Double.valueOf(speed));
+            } else {
+                position.setSpeed(0.0);
+            }
+
+            // Course
+            String course = parser.group(index++);
+            if (course != null) {
+                position.setCourse(Double.valueOf(course));
+            } else {
+                position.setCourse(0.0);
+            }
+
+            // Date
+            time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
+            time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
+            time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
+            position.setTime(time.getTime());
+
+            // Altitude
+            position.setAltitude(0.0);
+
+            return position;
+        }
+
+        return null;
+    }
+
+}